title: Orthogonal representation of sound dimensions in the primate midbrain.
abstract: Natural sounds are characterized by their spectral content and the modulation of energy over time. Using functional magnetic resonance imaging in awake macaques, we observed topographical representations of these spectral and temporal dimensions in a single structure, the inferior colliculus, the principal auditory nucleus in the midbrain. These representations are organized as a map with two approximately perpendicular axes: one representing increasing temporal rate and the other increasing spectral frequency.
authors.affiliation: Institute of Neuroscience, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK. simon.baumann@ncl.ac.uk
authors.forename: Simon
authors.initials: S
authors.lastname: Baumann
authors.forename: Timothy D
authors.initials: TD
authors.lastname: Griffiths
authors.forename: Li
authors.initials: L
authors.lastname: Sun
authors.forename: Christopher I
authors.initials: CI
authors.lastname: Petkov
authors.forename: Alexander
authors.initials: A
authors.lastname: Thiele
authors.forename: Adrian
authors.initials: A
authors.lastname: Rees
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D000162:Acoustics; D000818:Animals; D001307:Auditory Perception / Q000502:physiology*; D001931:Brain Mapping / Q000379:methods; D007245:Inferior Colliculi / Q000033:anatomy & histology* / Q000502:physiology*; D008253:Macaca mulatta